To Run DGN2SDO in DGN Mode

Check the DGN data and identify the data geometry type and level to convert.

Create a .BAT file and for each level/geometry type/other criteria combination, add one call to DGN2SDO, as shown below:

set dgn2sdo="C:\Program Files\Bentley\GeospatialExtension\bin\dgn2sdo.exe" 
set myoutdir=D:\data\OutputDGN2SDO\mibrag\topo 
set inmetadb=mcd/mcd@w2003db 
rem --------------------------------------- 
ECHO All features of topo*.dgn 
%dgn2sdo% IN_FILE="D:\data\Mibrag\mibrag1\topo\*.dgn" IN_TYPE=DGN IN_GEOM_TYPE=LINE OUT_GEOM_TABLE=BS_BK OUT_DIR=%myoutdir% IN_METADB=%inmetadb%

Run the batch file to create a set of SQL, CTL, DAT and one masterload.bat file.
Create a new user, tablespace (or existing one if the tablenames used do not already exist) in Oracle that will host the final data.
Run the masterload.bat file using, for example:
```
masterload.bat myuser/mypassword@[myservice]
```
This will create Oracle tables, set the Oracle spatial metadata and load the instance data (geometry in this case).